Finding the Fourth Proportional to 70,456.35, 105,689.52 and 28,336.66

Step by Step Solution

1. Step 1: Write the proportion equation
   70,456.35 : 105,689.52 = 28,336.66 : x
2. Step 2: Convert to fraction form
   70,456.35/105,689.52 = 28,336.66/x
3. Step 3: Cross multiply
   70,456.35x = 105,689.52 × 28,336.66
4. Step 4: Simplify right side
   70,456.35x = 2,994,887,993.80
5. Step 5: Solve for x
   x = 2,994,887,993.80/70,456.35
6. Step 6: Final answer
   x = 42,507.00